Abstract

Abstract. A monitoring program for a recently introduced vinegar fly, Drosophila suzukii Matsumura, 1931, was conducted in south-central Washington State, U.S.A. from March 2011 to November 2013. Along with D. suzukii, a complex of nine additional Drosophila Fallen, 1815 species were captured in baited traps and identified to species. The Drosophila were captured in Nalgene® and Haviland traps baited with apple cider vinegar or a sugar yeast mixture that were distributed among seven different horticultural crops or unmanaged habitats. All flies captured were identified to species and quantified for each sampling period. The species identified and quantified included D. busckii Coquillett, 1901, D. funebris Fabricius, 1787, D. hydei Sturtevant,1921, D. immigrans Sturtevant, 1921, D. melanogaster Meigen, 1830, D. simulans Sturtevant, 1919, D. obscura Fallen, 1823, D. subobscura Collin, 1936, D. subquinaria Spencer, 1942 and D. suzukii. The predominant species in 2011 were the obscura group and D. hydei. In ...

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